Mechanical Properties Versus Morphology of Ordered Polymers. Volume 6
Abstract
This project seeks to determine for rigid rod polymer fibers and films of poly(p-phenylene benzobisthiazole) the relationships between mechanical properties and sample microstructures and to use this knowledge to obtain the maximum in strength and modulus for these materials. Structural studies involved primarily optical microscopy, electron microscopy (both scanning and transmission) and wide angle x-ray scattering. Spectroscopic studies employed Fourier transform infrared spectroscopy. Mechanical behavior was measured in uniaxial tension over a range of strain rates and temperatures. A special force- temperature apparatus permitted assessment of the thermal expansion coefficient of PBT. The microstructural studies concentrated on the structure developed during the fast coagulation stage of the spinning process, as well as the structure obtained by slow coagulation of a quiescent isotropic polymer solution. Growth of crystal solvates in the PBT/MSA system was observed for the first time through the slow diffusion of water into the quiescent isotropic solution. Phase behavior was investigated and a pseudo-binary schematic phase diagram for the PBT/MSA.H2O system was developed. The force versus temperature behavior (at constant length) of PBT and Kevlar fibers was also investigated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA171221
Entities
People
- Edwin L. Thomas
- R. J. Farris
- S. L. Hsu
Organizations
- University of Massachusetts Amherst